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PAPER CYLINDER FOR GRAPHOPHONIG RECORDS.

No. 374.133. Patented Nov. 29,-1887.

M. r (gwenim N. PETERS. Plmoiillvognpher; Washfi nnnnnn c.

UNITED STATES PATENT OFFICE.

CHARLES SUMNER TAINTER, OF WASHINGTON, DISTRICT OF COLUMBIA.

PAPER CYLINDER FOR GRAPHOPHONIC RECORDS.

SPECIFICATION forming part of Letters Patent No. 374,133, dated November 29, 1887 Application filed April 27, 1887.

To all whom it may concern.-

Be it known that I, CHARLES SUMNER TAINTER, of Washington, in the District of Columbia, have invented a new and useful Improvement in Paper Cylinders for Graphophonic Records and for, other Purposes,which improvement is fully set forth in the following specification.

This invention relates to the construction of recording-tablets for making graphophonic records of the kind described in Letters Patent No. 341,288, granted to me May 4, 1886. As therein set forth, the recording-tablet consists of a hollow tube or cylinder of paper provided with a surface or coating of a waxy composition in which the record or phonogram is cut.

The term tablet is employed herein to designate the cylinder or tube upon which the record is formed, that term having been heretofore used in the art to designate such article.

The present invention has more particular reference to the construction of the paper tube or cylinder which I forms the base or foundation of the tablet.

Paper or card-board tubes are ordinarily made by rolling a flat sheet on a mandrel until the edges meet or overlap, and securing them by glue or otmdhesive substance. Cylinders made in this way will not preserve the true cylindrical shape, but tend to assume an elliptical form. If, after being coated with wax, such a cylinder loses its original shape, one result would be to crack the Wax coating and render it unsuitable for use. Itis desirable, moreover, that the tablet while possessing sufficient stiffness to be self-sustaining should be as light as possible, so as to be adapted for transmission through the mails. All these desirable objects are designed to be secured by the present invention, according to which the tube or cylinder is made of narrow strips of comparatively-light paper wound helically on a mandrel or former, one strip above the other, in such manner as to break joints, the two strips being fastened together with glue or other hardening cement. In this way cylinders can be cheaply made of Serial No. 236,304. (No model.)

The accompanying drawingrepresents a I paper tube or cylinder constructed in accordance with the invention.

A is the inner strip, and B the outer strip. Both are wound in such manner that the edges of the successive convolutions meet,

thus forming continuous cylindrical surfaces. 3 The two helices break joints, the edge of the inner strip being preferably under the middle of the outer strip. Before or during the process of winding one side of one or of both strips is coated with a suitable paste or glue, so that the two strips are firmly united. The use of a hardening cement or adhesive substance applied over the entire surface of the strips conduces to the stiffness of the cylinder and its permanence of shape.

0 represents a coating of wax applied to form a recording medium for graphophones. In the drawing the coating 0 is partly removed, so that the construction of the paper cylinder can be more clearly seen. The tube or cylinder could of course be composed of three or a greater number of strips wound in the same manner. WVhile it is preferred to wind the two strips in the same direction, it is obvious that the strips may not only break joints, but may be wound in opposite directions.

While paper is the material preferred on account of cheapness and other desirable properties, and is that which is practically used in carrying out this invention, it is obvious that other like material could be used, as, for example, parchment, tracing-linen, and other fabrics or tissues. It is not nec essary to employ paper of the same quality and thickness for both strips, and in some cases it may even be desirable to use for the outer strip a paper different in weight and quality from that used for the inner strip.

I claim--- A recording-tablet for graphophones, comspecification in the presence of two subscribing prising a paper cylinder formed. of two or witnesses.

more superposed helically wound strips of paper cemented together and a coating of wax CHARLES SUMNER TAINTER' 5 or a wax-like composition, substantially as de- W'itnesess:

scribed. PHILIP MAURO,

In testimony whereof I have signed this 0. J. HEDRICK. 

